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Supplemental information - Schedule of Redeemable Noncontrolling Interest (Details) - USD ($)
$ in Millions
3 Months Ended
Nov. 24, 2021
Nov. 30, 2021
Increase (Decrease) in Temporary Equity [Roll Forward]    
Beginning balance   $ 319
Acquisitions   2,489
Net (loss)   (21)
Redemption value adjustment   7
Currency translation adjustments and other   (8)
Ending balance   2,787
Conversion of Stock [Line Items]    
Acquisitions   2,489
VillageMD    
Increase (Decrease) in Temporary Equity [Roll Forward]    
Acquisitions   1,900
Conversion of Stock [Line Items]    
Acquisitions   $ 1,900
Value of purchase tender offer $ 1,900